V – volume of the room, m3S – total surface area of the room, m2a - average absorption coefficient of room surfacesµ - coefficient which takes account of attenuation of sound in air

Calculations can be performed for rooms for different purposes. Keep in mind diffuse sound field limitation of calculations accuracy for a small spaces.Besides using internal database of absorbers, the program allows to enter sound absorption coefficients of any arbitrary materials taken from reference books.Calculated value of reverberation time is graphically compared to recommended (optimum) values are in compliance with international standards: